Which of these is not a source cited in this passage? Research done by the Pew Research Center: "Cell Phone Activities 2012" An article from the website Edutopia.com: "How to Manage Cell Phones in the Classroom" The USA Today article: "More Schools use Cellphones as Learning Tools" An article from the academic journal Research in the Teaching of English: "A Call for New Research on New and Multi-literacies."